Continuous reaction process and continuous reaction equipment of ammonium sulfamate

Abstract

The invention discloses a continuous reaction process and continuous reaction equipment of ammonium sulfamate. The continuous reaction process comprises the steps of (1) taking 20-25% of ammonia water and sulfamic acid as raw materials, and adding the raw materials into a reactor, wherein the reactor is formed by connecting one or more solid-liquid mixers in series through a pipeline; (2) arranging temperature control equipment on both the solid-liquid mixers and the pipeline, and in the reaction process, carrying out compensation type heating on the solid-liquid mixers and the pipeline so as to enable the temperature required by the saturation solubility of the ammonium sulfamate in a direct reaction liquid state to be reached through the heat release of the reaction and the compensation heating of the reactor; and (3) after the reaction is finished, directly filtering, cooling and crystallizing without concentrating to obtain an ammonium sulfamate crystal product. According to the method, the ammonium sulfamate can be continuously and automatically produced, no carbon dioxide is generated, the method has great environmental protection significance, the reaction time is reduced from the hour level to the second level, no concentration process exists, and the energy consumption is greatly reduced.

Description

technical field [0001] The invention relates to the field of inorganic synthesis, in particular to a continuous reaction process and continuous reaction equipment for ammonium sulfamate. Background technique [0002] Ammonium sulfamate, with the molecular formula H6N2O3S, is widely used in pesticides, printing and dyeing, tobacco, building materials, textiles and other industries. [0003] In the prior art, the production of ammonium sulfamic acid generally adopts sulfamic acid and ammonium bicarbonate to react, comprising: (1) inject water or mother liquor into reactor, then add sulfamic acid and ammonium bicarbonate to carry out metathesis reaction while stirring . (2) After the reaction is completed, filter, heat and concentrate, then cool down and crystallize to obtain the product. [0004] There is following defective in above-mentioned prior art: (1) existing reaction method is tank reaction, can't accomplish continuous reaction, often because of temperature control ...

AI Technical Summary

Problems solved by technology

[0004] There is following defective in above-mentioned prior art: (1) existing reaction method is tank reaction, can't accomplish continuous reaction, often because of temperature control problem in the reaction process, the problem of inhomogeneous heat distribution in the still causes the decomposition of ammonium bicarbonate and The hydrolysis of sulfamic acid is easy to waste materials

(2) There is a concentration process, which consumes a lot of energy

(3) The reaction time is too long, 5 to 8 hours is a complete reaction cycle

relatively large energy consumption

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